No signal on monitor when connected to my gtx 750 ti to graphics card but show display when connected to my motherboard

First my gtx 750 ti was working fine but now it's not showing any display but graphics card fan is running. but when I connect it to my motherboard it show display.I have tried other graphics card and it works well.I bought my gtx 750 ti 4 months ago.i don't think my graphics card is damaged, or am I wrong. Can't figure it out the problem
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  1. Have you tried that card in another pc?
    Sounds to me like that card has bummed out and needs to be replaced.
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